[danieleither]

I have recently upgraded to PT Ultimate (2018.12) with 1 x HDX card. It's a fresh install on High Sierra (as recommended by Avid) - OS is also a fresh install.

I've installed UVI Falcon (using the Avid download links from my Avid account). It will open, and the GUI appears to be working correctly but after hitting a few notes (via MIDI from a controller keyboard) it will stutter and freeze. The amount of notes played before this happens varies depending on the patch loaded, some patches will play absolutely fine but most cause it to stutter and freeze. It typically freezes for around 5-10 seconds and then you can play it again (although it will do the same thing). Whilst 'frozen', when hitting notes on the controller keyboard no additional sounds play, and also the GUI keyboard in the plugin stops responding as well.

I've tried mucking around with buffer settings to no avail and having skipped through the menus and options, I can't see anything obvious that would cause this. Any suggestions?

Mac Pro 5.1 (2010)
Dual 3.46GHz / 12-Core
64GB RAM
GTX 780
250GB SSD Boot drive
2 x 1TB storage (7200rpm)
Mac OS High Sierra (10.13.16)